Iron Man - 3" IM2.5 Suspension Lift Kit W/KDDS - Toyota 4Runner 2010-2024
Premium 2.5-Inch Monotube Suspension, Refined Comfort, Responsive Control, Real-World Capability
IM2.5 is IRONMAN 4X4’s premium monotube suspension system, engineered for drivers who want improved ride comfort, handling stability, and off-road control without sacrificing daily drivability.
Built around a large 2.5-inch monotube design, high-pressure nitrogen charge, and vehicle-specific tuning, IM2.5 delivers a more responsive and composed driving experience across highways, rough roads, and technical terrain alike.
This is a performance suspension designed for real-world use, not just spec sheets.
- 2.5-inch monotube performance suspension
- Improved ride comfort & handling stability
- Vehicle-specific tuning for balanced performance
- Designed for on-road refinement & off-road control
- 4-year warranty
WHERE IM2.5 FITS
Not all suspension systems are designed for the same purpose:
Lift & Level - Improved stance and tire clearance. Maintains near-factory ride feel. Budget-friendly upgrade
Nitro-Gas - OEM+ strength and control. Daily driving and light off-road use.
Foam Cell Pro - Durability-first suspension system. Optimized for heavy loads, towing, and long-distance travel. Consistent performance under sustained heat and weight
IM2.5 Monotube - You are here
- Premium monotube ride quality and control
- More responsive handling and damping feel
- Comfortable daily driving with confident off-road capability
IM2.5 is designed for drivers who want a more composed, responsive, and confidence-inspiring suspension experience both on and off-road.
Stage 1 Includes:
- Front IM2.5 Coilovers
- Rear Adjustable Panhard Bar KDSS Compatible
- Rear Sway Bar Relocation Brackets KDSS Compatible
- Rear IM2.5 Shocks
- Rear Coil Springs
- Rear Bump Stop Spacer Kit
Stage 2 Includes:
- Stage 1 Components
- Pro Forge Upper Control Arms
Stage 3 Includes:
- Stage 1 & 2 Components
- Rear Adjustable Lower Trailing Arms
IM2.5 MONOTUBE
Built To Perform
Designed to deliver an unparalleled suspension upgrade for your vehicle’s comfort and on/off-road capability. IM2.5 features advanced monotube technology, precision valving, and superior heat dissipation to enhance stability, control, and driver confidence in any condition. Recommended for:
- Performance enthusiasts
- Lightly & heavily loaded trucks and SUVs
- Daily driven trucks and SUVs
WHY IM2.5 EXISTS
Many suspension systems force drivers into a compromise:
- Comfort on-road, but harshness off-road.
- Off-road capability, but poor daily drivability.
- Performance-focused tuning that becomes tiring over long distances.
IM2.5 was developed to deliver a more balanced suspension experience — combining responsive monotube performance with the ride quality and control needed for real-world driving.
The goal wasn’t to build a race shock.
It was to create a premium suspension system that feels controlled, predictable, and comfortable whether you’re commuting during the week, traveling long distances, or exploring rough terrain on the weekend.
THE MECHANISM
Monotube Technology: Faster Response, More Consistent Control
Unlike traditional twin-tube shock designs, a monotube shock uses a single large-diameter chamber with a floating piston separating the oil and high-pressure nitrogen gas.
This design allows the shock to react more quickly to changing terrain while maintaining more consistent damping control under repeated impacts and heat.
The IM2.5’s large 2.5-inch monotube body provides:
- Increased oil volume for improved temperature stability
- Faster damping response over rough terrain
- More consistent control during repeated impacts
- Improved ride composure on-road and off-road
Combined with vehicle-specific tuning and a large 57mm piston, IM2.5 delivers a suspension feel that is both responsive and refined.
RIDE QUALITY
IM2.5 is designed to deliver:
- More controlled and composed on-road handling
- Improved small-bump compliance and ride comfort
- Better stability over rough roads and uneven terrain
- More responsive suspension behavior at varying speeds
- Increased driver confidence both on and off-road
Compared to factory suspension, IM2.5 feels more planted, more responsive, and more controlled, especially as terrain becomes rougher or vehicle speeds increase.
This is not a soft luxury suspension system or an extreme race-focused setup.
It is engineered to provide a refined balance of comfort, capability, and control for real-world driving.
Refined On-Road. Confident Off-Road.
M2.5 Monotube Suspension is engineered to deliver the control, responsiveness, and comfort modern trucks deserve, without compromising real-world capability.
PROVEN & BACKED
IM2.5 suspension has been developed and tested in demanding off-road environments to deliver reliable real-world performance across a wide range of conditions.
Designed for mixed-use driving, IM2.5 is equally at home on:
- Daily-driven vehicles
- Weekend adventure builds
- Long-distance travel
- Rough backroads and trail systems
- Vehicles equipped with common aftermarket accessories
Backed by IRONMAN 4X4 and engineered for drivers who expect more from their suspension system.
WHO IM2.5 IS FOR
Choose IM2.5 if you:
- Want improved ride comfort and handling stability
- Spend time driving both on-road and off-road
- Want more responsive suspension performance than stock
- Value control and composure over rough terrain
- Want a premium suspension system that remains comfortable for daily driving
- Prefer a refined, performance-oriented suspension feel
If your priority is heavy constant load carrying or long-distance overland weight management, Foam Cell Pro may be a better fit.
If your priority is basic ride height and stance improvement, Lift & Level may be the better option.